BMW 5 Series E39

1. Uncover injectors.
2. Start the engine on single turns.
3. On the working engine a stethoscope listen to each injector. Gates of injectors have to click when opening and closing.
4. If there is no stethoscope, it is possible to put the screw-driver or a finger.
5. If unusual noise or absence it is found, it is necessary to check tension, resistance and tightness of injectors.

1. Check tension. For this purpose to a rasstykuyta shtekerny connection of injectors also attach a diode control lamp between contacts of wires of food. Include a starter. The light-emitting diode has to blink.
2. If the diode does not blink, wire breakage or malfunction of the control unit can be the cause.
3. Switch off ignition.
4. Attach an ohmmeter between both contacts on each injector and measure resistance. If resistance differs from set, replace an injector. Resistance has to be 15 — 17.5 Ohms.
5. If necessary replace a faulty injector.

1. Remove injectors. Do not disconnect fuel-supply lines from the distributive highway.
2. Attach a plug to injectors.
3. Lower injectors in capacity.
4. Ask the assistant several seconds to press a starter. Compare the nature of injection of injectors among themselves. All injectors have to have a cone-shaped injection and identical.
5. Switch off ignition.
6. Disconnect a plug level of injectors.
7. Include on 5 about ignition, without including a starter. Check tightness: within one minute one drop, has to be formed no more.
8. Establish injectors.